bpf, net: xskmap memory usage

A new helper is introduced to calculate xskmap memory usage.

The xfsmap memory usage can be dynamically changed when we add or remove
a xsk_map_node. Hence we need to track the count of xsk_map_node to get
its memory usage.

The result as follows,
- before
10: xskmap  name count_map  flags 0x0
        key 4B  value 4B  max_entries 65536  memlock 524288B

- after
10: xskmap  name count_map  flags 0x0 <<< no elements case
        key 4B  value 4B  max_entries 65536  memlock 524608B

Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Link: https://lore.kernel.org/r/20230305124615.12358-17-laoar.shao@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

This commit is contained in:

Yafang Shao

2023-03-05 12:46:13 +00:00

committed by

Alexei Starovoitov

parent 73d2c61919

commit b4fd0d672b

2 changed files with 14 additions and 0 deletions

									
										include/net/xdp_sock.h
									
		+1
		
												View File
												
				@@ -38,6 +38,7 @@ struct xdp_umem {

				struct xsk_map {

					struct bpf_map map;

					spinlock_t lock; /* Synchronize map updates */

					atomic_t count;

					struct xdp_sock __rcu *xsk_map[];

				};